<template>
	<view>
		<my-search @gotoSearch="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh+'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item',index===active?'active':'']" @click="handlerActive(index)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>
			<scroll-view scroll-y="true" class="right-scroll-view" :style="{height:wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,index2) in cateLevel2" :key="index2">
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item3,index3) in item2.children" :key="index3"
							@click="gotoGoodsList(item3)">
							<image :src="item3.cat_icon"></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import myMixin from '../../mixins/tabbar-badge.js'
	export default {
		mixins: [myMixin],
		data() {
			return {
				scrollTop: 0, //	滚动条到顶
				wh: 0, // 当前设备可使用的高度
				active: 0, //	当前选中项的索引
				cateList: [], //	获取分类数据
				cateLevel2: [], //	二级分类数据
			};
		},
		onLoad() {
			this.wh = uni.getSystemInfoSync().windowHeight - 50 // 获取当前设备的可用高度并赋值给wh
			this.getCateList() //	获取分类数据
		},
		methods: {
			async getCateList() { //	获取分类数据
				const res = await uni.$http.get('/api/public/v1/categories')
				if (res.statusCode !== 200) {
					return uni.$showMsg()
				}
				this.cateList = res.data.message
				this.cateLevel2 = res.data.message[0].children
			},
			handlerActive(index) { //	切换当前选中项
				this.active = index
				this.cateLevel2 = this.cateList[index].children
				this.scrollTop = this.scrollTop === 0 ? 0.1 : 0
			},
			gotoGoodsList(item3) { //	跳转到商品列表页面
				uni.navigateTo({
					url: `/subpkg/goods_list/goods_list?cid=${item3.cat_id}`
				})
			},
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		},
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;

			.left-scroll-view-item {
				background-color: #f7f7f7;
				line-height: 60px;
				text-align: center;
				font-size: 12px;

				&.active {
					background-color: #ffffff;
					position: relative;

					&::before {
						content: '';
						display: block;
						width: 3px;
						height: 30px;
						background-color: #c00000;
						position: absolute;
						top: 50%;
						left: 0;
						transform: translateY(-50%);
					}
				}
			}

		}

		.right-scroll-view {
			background-color: #ffffff;

			.cate-lv2-title {
				font-size: 12px;
				font-weight: bolder;
				text-align: center;
				padding: 15px 0;
			}

			.cate-lv3-list {
				display: flex;
				flex-wrap: wrap;

				.cate-lv3-item {
					width: 33.33%;
					display: flex;
					flex-direction: column;
					justify-content: center;
					align-items: center;
					margin-bottom: 10px;

					image {
						width: 60px;
						height: 60px;
					}

					text {
						font-size: 12px;
					}
				}
			}
		}


	}
</style>
